1 files changed, 152 insertions, 0 deletions
diff --git a/src/go/collectors/go.d.plugin/modules/couchbase/collect.go b/src/go/collectors/go.d.plugin/modules/couchbase/collect.go
new file mode 100644
index 000000000..2d4d3626d
--- /dev/null
+++ b/src/go/collectors/go.d.plugin/modules/couchbase/collect.go
@@ -0,0 +1,152 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+package couchbase
+
+import (
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"net/url"
+
+	"github.com/netdata/netdata/go/go.d.plugin/agent/module"
+	"github.com/netdata/netdata/go/go.d.plugin/pkg/web"
+)
+
+const (
+	urlPathBucketsStats = "/pools/default/buckets"
+
+	precision = 1000
+)
+
+func (cb *Couchbase) collect() (map[string]int64, error) {
+	ms, err := cb.scrapeCouchbase()
+	if err != nil {
+		return nil, fmt.Errorf("error on scraping couchbase: %v", err)
+	}
+	if ms.empty() {
+		return nil, nil
+	}
+
+	collected := make(map[string]int64)
+	cb.collectBasicStats(collected, ms)
+
+	return collected, nil
+}
+
+func (cb *Couchbase) collectBasicStats(collected map[string]int64, ms *cbMetrics) {
+	for _, b := range ms.BucketsBasicStats {
+
+		if !cb.collectedBuckets[b.Name] {
+			cb.collectedBuckets[b.Name] = true
+			cb.addBucketToCharts(b.Name)
+		}
+
+		bs := b.BasicStats
+		collected[indexDimID(b.Name, "quota_percent_used")] = int64(bs.QuotaPercentUsed * precision)
+		collected[indexDimID(b.Name, "ops_per_sec")] = int64(bs.OpsPerSec * precision)
+		collected[indexDimID(b.Name, "disk_fetches")] = int64(bs.DiskFetches)
+		collected[indexDimID(b.Name, "item_count")] = int64(bs.ItemCount)
+		collected[indexDimID(b.Name, "disk_used")] = int64(bs.DiskUsed)
+		collected[indexDimID(b.Name, "data_used")] = int64(bs.DataUsed)
+		collected[indexDimID(b.Name, "mem_used")] = int64(bs.MemUsed)
+		collected[indexDimID(b.Name, "vb_active_num_non_resident")] = int64(bs.VbActiveNumNonResident)
+	}
+}
+
+func (cb *Couchbase) addBucketToCharts(bucket string) {
+	cb.addDimToChart(bucketQuotaPercentUsedChart.ID, &module.Dim{
+		ID:   indexDimID(bucket, "quota_percent_used"),
+		Name: bucket,
+		Div:  precision,
+	})
+
+	cb.addDimToChart(bucketOpsPerSecChart.ID, &module.Dim{
+		ID:   indexDimID(bucket, "ops_per_sec"),
+		Name: bucket,
+		Div:  precision,
+	})
+
+	cb.addDimToChart(bucketDiskFetchesChart.ID, &module.Dim{
+		ID:   indexDimID(bucket, "disk_fetches"),
+		Name: bucket,
+	})
+
+	cb.addDimToChart(bucketItemCountChart.ID, &module.Dim{
+		ID:   indexDimID(bucket, "item_count"),
+		Name: bucket,
+	})
+
+	cb.addDimToChart(bucketDiskUsedChart.ID, &module.Dim{
+		ID:   indexDimID(bucket, "disk_used"),
+		Name: bucket,
+	})
+
+	cb.addDimToChart(bucketDataUsedChart.ID, &module.Dim{
+		ID:   indexDimID(bucket, "data_used"),
+		Name: bucket,
+	})
+
+	cb.addDimToChart(bucketMemUsedChart.ID, &module.Dim{
+		ID:   indexDimID(bucket, "mem_used"),
+		Name: bucket,
+	})
+
+	cb.addDimToChart(bucketVBActiveNumNonResidentChart.ID, &module.Dim{
+		ID:   indexDimID(bucket, "vb_active_num_non_resident"),
+		Name: bucket,
+	})
+}
+
+func (cb *Couchbase) addDimToChart(chartID string, dim *module.Dim) {
+	chart := cb.Charts().Get(chartID)
+	if chart == nil {
+		cb.Warningf("error on adding '%s' dimension: can not find '%s' chart", dim.ID, chartID)
+		return
+	}
+	if err := chart.AddDim(dim); err != nil {
+		cb.Warning(err)
+		return
+	}
+	chart.MarkNotCreated()
+}
+
+func (cb *Couchbase) scrapeCouchbase() (*cbMetrics, error) {
+	ms := &cbMetrics{}
+	req, _ := web.NewHTTPRequest(cb.Request)
+	req.URL.Path = urlPathBucketsStats
+	req.URL.RawQuery = url.Values{"skipMap": []string{"true"}}.Encode()
+
+	if err := cb.doOKDecode(req, &ms.BucketsBasicStats); err != nil {
+		return nil, err
+	}
+	return ms, nil
+}
+
+func (cb *Couchbase) doOKDecode(req *http.Request, in interface{}) error {
+	resp, err := cb.httpClient.Do(req)
+	if err != nil {
+		return fmt.Errorf("error on HTTP request '%s': %v", req.URL, err)
+	}
+	defer closeBody(resp)
+
+	if resp.StatusCode != http.StatusOK {
+		return fmt.Errorf("'%s' returned HTTP status code: %d", req.URL, resp.StatusCode)
+	}
+
+	if err := json.NewDecoder(resp.Body).Decode(in); err != nil {
+		return fmt.Errorf("error on decoding response from '%s': %v", req.URL, err)
+	}
+	return nil
+}
+
+func closeBody(resp *http.Response) {
+	if resp != nil && resp.Body != nil {
+		_, _ = io.Copy(io.Discard, resp.Body)
+		_ = resp.Body.Close()
+	}
+}
+
+func indexDimID(name, metric string) string {
+	return fmt.Sprintf("bucket_%s_%s", name, metric)
+}